3335d5a504
Many signals used in internal and public APIs carry the emitter pointer as a signal argument. This was done to allow slots connected to multiple signal instances to differentiate between emitters. While starting from a good intention of facilitating the implementation of slots, it turned out to be a bad API design as the signal isn't meant to know what it will be connected to, and thus shouldn't carry parameters that are solely meant to support a use case specific to the connected slot. These pointers turn out to be unused in all slots but one. In the only case where it is needed, it can be obtained by wrapping the slot in a lambda function when connecting the signal. Do so, and drop the emitter pointer from all signals. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2018, Google Inc.
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*
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* media_device.h - Media device handler
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*/
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#ifndef __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__
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#define __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__
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#include <map>
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#include <sstream>
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#include <string>
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#include <vector>
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#include <linux/media.h>
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#include <libcamera/base/log.h>
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#include <libcamera/base/signal.h>
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#include "libcamera/internal/media_object.h"
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namespace libcamera {
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class MediaDevice : protected Loggable
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{
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public:
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MediaDevice(const std::string &deviceNode);
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~MediaDevice();
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bool acquire();
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void release();
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bool busy() const { return acquired_; }
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bool lock();
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void unlock();
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int populate();
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bool isValid() const { return valid_; }
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const std::string driver() const { return driver_; }
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const std::string deviceNode() const { return deviceNode_; }
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const std::string model() const { return model_; }
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unsigned int version() const { return version_; }
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unsigned int hwRevision() const { return hwRevision_; }
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const std::vector<MediaEntity *> &entities() const { return entities_; }
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MediaEntity *getEntityByName(const std::string &name) const;
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MediaLink *link(const std::string &sourceName, unsigned int sourceIdx,
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const std::string &sinkName, unsigned int sinkIdx);
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MediaLink *link(const MediaEntity *source, unsigned int sourceIdx,
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const MediaEntity *sink, unsigned int sinkIdx);
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MediaLink *link(const MediaPad *source, const MediaPad *sink);
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int disableLinks();
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Signal<> disconnected;
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protected:
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std::string logPrefix() const override;
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private:
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int open();
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void close();
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MediaObject *object(unsigned int id);
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bool addObject(MediaObject *object);
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void clear();
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struct media_v2_interface *findInterface(const struct media_v2_topology &topology,
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unsigned int entityId);
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bool populateEntities(const struct media_v2_topology &topology);
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bool populatePads(const struct media_v2_topology &topology);
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bool populateLinks(const struct media_v2_topology &topology);
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void fixupEntityFlags(struct media_v2_entity *entity);
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friend int MediaLink::setEnabled(bool enable);
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int setupLink(const MediaLink *link, unsigned int flags);
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std::string driver_;
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std::string deviceNode_;
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std::string model_;
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unsigned int version_;
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unsigned int hwRevision_;
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int fd_;
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bool valid_;
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bool acquired_;
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bool lockOwner_;
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std::map<unsigned int, MediaObject *> objects_;
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std::vector<MediaEntity *> entities_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__ */
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